Home / 13,811.85-20,741.47-13,188.56

Finding the Fourth Proportional to 13,811.85, 20,741.47 and 13,188.56

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Solution

The fourth proportional to 13,811.85, 20,741.47 and 13,188.56 is: 19,805.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.85 : 20,741.47 = 13,188.56 : x
  2. Step 2: Convert to fraction form
    13,811.85/20,741.47 = 13,188.56/x
  3. Step 3: Cross multiply
    13,811.85x = 20,741.47 × 13,188.56
  4. Step 4: Simplify right side
    13,811.85x = 273,549,984.90
  5. Step 5: Solve for x
    x = 273,549,984.90/13,811.85
  6. Step 6: Final answer
    x = 19,805.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.